Setup errors and invalid operation exception

I have been following the example, but trying to start the game throws an exception:

> InvalidOperationException: Cannot override system-specified headers
UnityEngine.Networking.UnityWebRequest.SetRequestHeader (System.String name, System.String value) (at :0)
UnityEngine.WWW..ctor (System.String url, System.Byte[] postData, System.Collections.Generic.Dictionary`2[TKey,TValue] headers) (at <545425060cf44a88bfddbe49cbfe1747>:0)
Amazon.Runtime.Internal.UnityMainThreadDispatcher+d__7.MoveNext () (at C:/a/uv3/sdk/src/Core/Amazon.Runtime/Pipeline/_unity/UnityMainThreadDispatcher.cs:130)
UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at <05f2ac9c8847426992765a22ef6d94ca>:0)
UnityEngine.MonoBehaviour:StartCoroutine(IEnumerator)
Amazon.Runtime.Internal.UnityMainThreadDispatcher:ProcessRequests() (at C:/a/uv3/sdk/src/Core/Amazon.Runtime/Pipeline/_unity/UnityMainThreadDispatcher.cs:71)
Amazon.Runtime.Internal.UnityMainThreadDispatcher:Update() (at C:/a/uv3/sdk/src/Core/Amazon.Runtime/Pipeline/_unity/UnityMainThreadDispatcher.cs:57)

this seems to happen between client context setup for mobile analytics and when mobile analytics begins store session info. I know with asyncronous calls this could be anything but it is preventing me from continuing on.

This issues occurs on Unity version 2019.3.9f1 Personal